Federal direct subsidized loans are based on financial need. The federal government pays the interest during in-school, grace and deferment periods. Federal direct unsubsidized loans are not based on financial need, and the federal government does not pay the interest for these loans. Students may choose to defer interest payments until repayment begins; however, the student is responsible for all interest that accrues.
1 Outdoor air pollution can cause ongoing throat irritation. Indoor pollution â tobacco smoke or chemicals â also can cause a chronic sore throat. Chewing tobacco, drinking alcohol and eating spicy foods also can irritate your throat.  Muscle strain.
Cancer and its treatment can sometimes cause difficulty chewing and/or swallowing. Difficulty chewing can result from physical changes to the mouth, jaw or tongue caused by cancers like oral cancer. Pain or difficulty swallowing, or dysphagia, is a common symptom of cancers like throat cancer and esophageal cancer. Symptoms of dysphagia may include pain while swallowing, inability to swallow, choking or coughing while eating, a sensation of food getting stuck in the throat, and soreness, pain and/or swelling in the throat or mouth. Difficulty chewing and/or swallowing can be scary.